Exhaust-pipe of locomotive-engines



v'unirse srarns Parana" ernten G. W. LATIIROP, OF WEEDS'POR'I, NEW YORK.

EXHAUST-PIPE OF LOCOMOTIVE-ENGINES.

Specification of Letters Patent No. 30,976, dated December 18, 1860.

To all whom t may concern:

Be it known that I, GEORGE W. LATHRoP, of Veedsport, in the county ofCayuga and State of New York, have invented a new and useful Improvementin Adjusting Variable-Exhaust Nozzles; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the accompanying drawings, forming a part of thisspecication, in

which` Figure l is a transverse vertical section showing the smoke arch,variable exhausting apparatus and the steam pipes. Fig. 2 is ahorizontal sectionj of the same. Figs. 3 and t are longitudinal sectionsof the same, and Fig. 5 isl a front end view of the whole apparatus; thehead of the smoke arch being removed.

Similar letters of reference, in each of the several figures indicatecorresponding parts.

The nature of my invention consists, first, in the combination of anadjustable beveled guide flange or lug and adjusting rods which extendout beyond the front of the smoke arch, with the seat and stationarybeveled guide lug of the exhaust pipes, and the slide that carries thevariable exhausting nozzles, substantially in the manner hereinafterdescribed. The design of this part of my invention is to enable theengineer, from the outside of the arch, to relieve the slide whichcarries the variable exhausting nozzles, whenever the same becomes setor stuck fast on its seat. The sticking of the nozzle slide has alwaysbeen the greatest difficulty attending the use of variable slidingexhaust nozzles, and therefore my improvement is of importance.

Second, in combination with exhaust pipes which branch out toward thesides of the smoke arch and terminate in a slide seat that runs acrossthe arch, my invention consists in the combined arrangement of a slottedlink that takes hold of the remotest end of the nozzle slide, a verticalrod, two horizontal crank arms-set at right angles to one another, and ahorizontal longitudinal lever, substantially as hereinafter described.The first design of this part of my invention is to afford more room inthe rear end of the arch for the steam pipes, and thus obviate thenecessity of foreshortening the exhaust pipes in order to get them underthe steam pipes, and then adding to their length by placing what isVtermed a petticoat pipe (which destroys the natural draft of thelocomotive) above them. These difiiculties are obviated by setting theseat of the nozzle slide across the chamber of the smoke arch and nearthe front end of the same, and thereby leaving plenty of room in rear orbeyond it for the main and branch steam pipes. If the nozzle slide wereemployed within an arch after the manner shown in Espenschades patent of1854, to wit, longitudinally with the chamber ofthe arch, the nozzleswould have to be -placed so near the bottom of the smoke arch that withoutside connected engines, there would necessarily be formed almost asquare corner where the pipes intersect one another in order to get themunder the nozzles. Such a square corner causes a very heavy backpressure on the piston of the engine, and its avoidance by myarrangement does away with another seriousv difficulty attending theworking of sliding variable exhaust nozzles. Another design of thesecond part of my invention is to give a more direct thrust or pull uponthe slide that carries the nozzles, than is obtained by otherarrangements. The slotted link by taking hold of the extreme rear end ofthe nozzle slide, moves the slide without hardly any deflection from astraight line.

To enable others, skilled in the art, to make and use my invention, Iwill proceed to describe its construction and operation.

A, is the smoke arch. B, the main supply steam pipe, and C, C, thebranch steam pipes leading to the engine cylinder.

D, D, are the exhaust or waste steam pipes constructed and arranged tostand obliquely within and across the chamber of the smoke arch, and tointersect one another near the center of said chamber and to terminatein a circular neck on which is mounted an oblong seat E, running acrossthe Ichamber of the arch, all as represented.

F, is a stationary flange or lug raised on the rear edge of the seat andG, is a similar adjustable fiange or lug arranged on the front edge ofthe seat; the inner faces of these flanges are beveled so that the twoform a dovetail shaped guide way for the nozzle slide to move in.

The fiange G, is attached fast to the inner ends of two horizontal screwrods I, I, which extend from the front of the arch to seat E, and screwinto the latter, as represented. The outer ends of the rods are madesquare so that a Wrench may be-"=applied to them When it is necessary torelieve the nozzle slide by causing the flange G, to recede from thesaid slide.

J, is the slide Which carries the variable exhaust nozzles M, M. Thisslide is beveled on both of its edges so as to match the bevels of theflanges or lugs F, G. It Will be observed that the bevel of the slideand flanges is such that When the flange G, is adjusted, the exhaustnozzle slide has not only a freedom of movement on its seat, but alsohas a chance to move up and down to a certain extent.

K, is the slotted connecting link-it encircles the exhaust nozzles andis fastened loosely by a pivot a, to themost remote part of the nozzleslide in order that very little deflection, in the slide, from astraight line shall take place. The other end of this link is fastenedloosely by means of a pivot b, to a horizontal crank arm c, of avertical rock shaft (Z, one end vof said shaft resting on a bracket e,Within the smoke arch, and the other end extending out through the topof the smoke arch and having a horizontal crank arm f, attached to it.To the crank arm f, a notched adjusting lever L, running longitudinallyWith the smoke arch, is pivoted as represented.

The exhaust nozzles, in my arrangement, regulate the escape of Wastesteam in the ordinary manner, viz:*by sliding a large or small nozzleover the circular hole inclosed by the neck of the Waste steam orexhaust pipes, accordingly as the necessities of the case may demand.

That l claim as my invention and desire to secure'by Letters Patent, is-

l. The combination of an adjustable beveled guide flange or lug G, andadjusting rods I, I, Which extend out beyond the front of the smoke archA; With the seat E, and stationary beveled guide lug` F, of the exhaustpipes D, D, and the slide J, that carries the variable exhaustingnozzles M, M, substantially as and for the purposes set forth.

2. In combination With exhaust pipes D, D, Which branch out toward thesides of the smoke arch and terminate in a slide seat E, that runsacross the arch, I claim the combined arrangement of a slotted link Kthat takes hold of the reinotest end of the nozzle slide J, a verticalrod d, two horizontal crank arms c, f, set at right angles to oneanother, and a horizontal longitudinal lever L, substantially as and forthe purposes set forth.

The above specification of my improvement in adjusting variable exhaustssigned by me this 18th day of October 1860.

GEO. W. LATHROP.

Witnesses:

GOODWIN Y. AT LEE, RoBT. W. FENWICK.

